Alice In Chains Songs A electric guitar pickup is basically similar to a powerful microphone coil. For decades, energetic microphones have already been wired with the style coil mounted on the principal of the microphone's transformer, and not referenced to floor (‘floating'). The microphone's event is typically connected to the wire guard, which will be connected to the microphone amplifier's soil (see Rane's site for more discussion).
By and big, dynamic microphones are very quiet devices consequently of the mix of transformer isolation and healthy, flying indication lines during, in addition to shielded, humbucking coils.
So why not instruments? Guitars are notoriously plagued by noise. Humbucking pickups are only an incomplete (though essential!) solution. Well-known alternative would be to float your guitar collection to a balanced output, being a microphone. A similar thought was published this 2001 patent program such as Alice In Chains Songs?